Wideband acoustic immittance measurement apparatus

A wideband acoustic immittance measurement apparatus for determination of wideband acoustic immittance in an ear of a human, comprising

• an ear probe configured to be inserted in the ear of the human and having an acoustic output port configured to emit sound into the ear of the human, and
• an acoustic input port configured to receive sound in the ear of the human, and a loudspeaker that is acoustically connected with the acoustic output port of the ear probe for emission of the sound, and
• a microphone that is acoustically connected with the acoustic input port of the ear probe for generation of an input audio signal as a function of sound pressure at the acoustic input port, and
• a processor that is adapted for
• providing an output audio signal to the loudspeaker for conversion into sound spanning a frequency range, and
• receiving the input audio signal generated by the microphone,
• determining wideband acoustic immittance F(f) as a function of frequency f based on the output audio signal and the input audio signal,
• identifying a middle ear resonance based on the determined wideband acoustic immittance F(f) at a resonance frequency fres at which an acoustic admittance Y(f)=G(f)+jB(f) corresponding to the determined wideband acoustic immittance F(f) fulfils that a conductance G(fres) is a maximum of a conductance G(f) and that a gradient B′(fres) of a susceptance B(f) is a minimum of a gradient B′(f), where j is √{square root over (−1)}.